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Submitted ByMohan Patwa
Submitted ToMr. Rajendra YadavMrs. Tapati Yadav
Computer Aided Design
Contents:-
•Engineering Drawing•Design Process•Computer Aided Design Procedure•Geometric Modeling•2D Model & 3D Model •Difference Between 2-D& 3-D Model•3-D Models•Comparison Of Various Modeling Technique•Geometric Modeling Example With Procedure•Analysis And Design Review•Analysis Results•Model Drafting Procedure
Engineering Drawing
A graphical language that communicates ideas and information from one mind to another.
Design Process
• It is an innovative and iterative process.• It is a decision making process.• It is a communication intensive activity in which both words and pictures are used.• Designs are subjected to problem solving constraints.
Specific Information Design Operation Outcome
General Information
EvaluationFeedback Loop
NO YESGo to the Next Step
Computer Aided Design Procedure
Recognition of need
Definition of problem
Synthesis
Analyze and Optimization
Evaluation and
Presentation
Geometric Modeling
Engineering & Analysis
Design review & Evaluation
Automated Drafting
Geometric Modeling
Geometric modeling is a branch of applied mathematics and computational geometry that studies methods and algorithms for the mathematical description of shapes.
Geometric Modeling
2D Modeling 3D Modeling
Line Model Surface Model Solid Model
2D Model & 3D Model
2D Model 3D Model
Difference Between 2-D & 3-D Model
Description 2-D Model 3-D Model
Use Simple 2D Objects Complicated 3D Objects
Co-ordinate System
WCB UCS
Views Generation Difficult Easy
End Lines Representation
(X,Y) (X,Y,Z)
Curve Edges Representation
Circle, Ellipse, Splines Etc. Suitably Spaced Generators
Complex Object Representation
Required Additional Views And Sectional Views
Complex Component Can Be Interpreted Correctly
3-D Models
WIREFRAME MODEL SURFACE MODEL SOLID MODEL
Comparison Of Various Modeling Technique
Wireframe Model Surface Model Solid Model
Automatic View Generation
Not Possible Not Possible Possible
Elimination Of Hidden Lines
Manually Guided May Be Possible Possible
Cross Sectioning Manually Guided Manually Guided Possible Even Automated Crosshatching Is Possible
Analysis Function Difficult Or Not Possible
Difficult Or Not Possible
Possible
NC Application Difficult Or Not Possible
Automatic Possible
Interpretation Ambiguous Relatively Easy Clear
Geometric Modeling Example With Procedure
Analysis And Design Review
Analysis Results
Model Drafting Procedure
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